To estimate the price of the 2015 BMW 730 Twin Power Turbo I6 3.0L Li (Top), I focused on the selling prices of similar cars. The most relevant data point is the 2015 BMW 730 Li Twin Power Turbo I6 3.0L with 62700 km, sold for 82000 SAR on 2024-06-27. This car is the same variant and has lower mileage, but was in average condition. Another relevant data point is the 2014 BMW 730 Li Twin Power Turbo I6 3.0L with 230000 km, sold for 40000 SAR on 2024-10-23, but it had much higher mileage and was in average condition. The 2014 BMW 730 Li I6 3.0L with 218905 km, sold for 44000 SAR on 2024-09-11, was in good condition but also had much higher mileage. The listed prices for similar cars range from 57000 to 68500 SAR, but these are typically higher than actual selling prices. Considering the target car's good condition and mileage of 129000 km, I estimate its market price to be slightly lower than the 82000 SAR car due to higher mileage, but higher than the listed prices due to its better condition.